178 
THE STUDY OF INSECTS . 
these are attached to stones or other objects overhanging 
the water. They are laid in blotch-like masses, which are 
chalky-white in color, and measure from half an inch to nearly 
an inch in diameter. A single mass contains from two thou¬ 
sand to three thousand eggs. When the larvae hatch they 
at once find their way into the water, where they remain 
until full grown. 
There are other common species of the family which 
closely resemble Corydalis but are smaller, the larger ones 
measuring less than two and a half inches in length, and 
having a wing expanse of not more than four inches. These 
insects also differ from Corydalis in having three ocelli and 
in lacking the sharp tooth-like angles on the sides of the back 
part of the head. See Figure 215 of the adult Corydalis . 
These species belong to the genus Chauliodes (Chau-li'o-des). 
Chauliodes pecticornis (pec-ti-cor'nis) is a common species 
with grayish wings and feather-like antennae. Chauliodes 
serricornis (ser-ri-cor'nis) is also common ; this is a brownish- 
black species with the wings spotted with white, and with 
serrate antennae. 
Family RAPHIDIIDiE (Raph-i-di'i-dae.) 
The Raphidians (Ra-phid' i-ans). 
The members of this family are found in this country 
only in the far West. They are strange-appearing insects, 
the prothorax being greatly elongated, like the neck of a 
camel (Fig. 217). The female bears a long, 
slender, sickle-shaped ovipositor at the end 
the abdomen. The fore legs resemble 
female. the other pairs of legs, and are borne at the 
hinder end of the prothorax. 
The larvae are found under bark and are carnivorous. 
We have found them common under the loose bark of the 
Eucalyptus. They also occur in orchards, and doubtless do 
good by destroying the larvae and pupae of the Codlin-moth. 
